@Yann: Hi,where does something say 0.00 Megapixel somewhere? Please follow https://www.mediawiki.org/wiki/How_to_report_a_bug and use the bug report form for bug reports (it is linked at the top).

This reminded me a bit of T286273 but that one is about a PNG file instead.

In T297942#7577450, @Aklapper wrote:

@Yann: Hi,where does something say 0.00 Megapixel somewhere? Please follow https://www.mediawiki.org/wiki/How_to_report_a_bug and use the bug report form for bug reports (it is linked at the top).

I think this is done by a gadget, which calculate the size. Here 0 x 0 =0.

Hello,

I occur the same issue with this PDF : https://commons.wikimedia.org/wiki/File:L%E2%80%99Aclot.pdf, wich has a dimension 0 × 0 on Commons, but recognized correctly (1 237 × 1 750) on wa.wikisource https://wa.wikisource.org/wiki/File:L’Aclot.pdf

The strangest thing is that the version of December 9 at 9:06 pm was displayed with a dimension 0 × 0 (as summarized in the next version at 9:54 pm), but now this version is shown with the real dimension 1 237 × 1 750.

Older version of https://commons.wikimedia.org/wiki/File:The_Collected_Works_of_Mahatma_Gandhi,_vol._2.pdf
and https://commons.wikimedia.org/wiki/File:Gandhi_-_Dakshin_Afrika_Ke_Satyagraha_(Hindi).pdf

Another file: https://commons.wikimedia.org/wiki/File:%E0%A4%B8%E0%A4%AE%E0%A5%8D%E0%A4%AA%E0%A5%82%E0%A4%B0%E0%A5%8D%E0%A4%A3_%E0%A4%97%E0%A4%BE%E0%A4%81%E0%A4%A7%E0%A5%80_%E0%A4%B5%E0%A4%BE%E0%A4%82%E0%A4%97%E0%A5%8D%E0%A4%AE%E0%A4%AF_Sampurna_Gandhi,_vol._14.pdf

I went through all PDF and Djvu files on Commons and made a list of those which are valid, but are shown as 0x0 without thumbnails, the list is here: T301291

This still happens, see 2nd revision of https://commons.wikimedia.org/wiki/File:Robida_-_La_Guerre_au_vingti%C3%A8me_si%C3%A8cle,_bpt6k3120885.pdf

One more case https://commons.wikimedia.org/wiki/File:JohnAndPsalms.pdf

One more https://commons.wikimedia.org/wiki/File:Amulet_1833.pdf

One more https://commons.wikimedia.org/wiki/File:Singer-Siddur-1915-AI.pdf

One more https://commons.wikimedia.org/wiki/File:The_Century_Dictionary_and_Cyclopedia%2C_vol._2_(cu31924091890594).pdf 2nd version

I even got a "crash"

Request from 90.112.34.87 via cp6012 cp6012, Varnish XID 92742326
Error: 503, Backend fetch failed at Tue, 06 Jun 2023 10:59:01 GMT

Further issue is that it crashes this https://commons.wikimedia.org/w/index.php?title=Commons:MyGallery&withJS=MediaWiki:JSONListUploads.js&gUser=Yann

If code crashes then the code should be made more robust not to crash.

https://commons.wikimedia.org/wiki/File:First_book_of_the_Iliad;_Battle_of_the_frogs_and_mice;_Hymn_to_the_Delian_Apollo;_Bacchus,_or,_the_Rovers;_second_book_of_the_Iliad_(IA_firstbookofiliad00home).pdf

The problem seems to be not only PDF related. This djvu file shows the same effect:
https://commons.wikimedia.org/wiki/File:PL_JI_Kraszewski_Zygzaki.djvu
As a workaround, we uploaded the file directly to Wikisource:
https://pl.wikisource.org/wiki/Plik:PL_JI_Kraszewski_Zygzaki.djvu
It works. But should we stop using Commons?

Maybe RefreshImageMetadata.php on PL_JI_Kraszewski_Zygzaki.djvu would help?

In T297942#9644062, @Wargo wrote:

Maybe RefreshImageMetadata.php on PL_JI_Kraszewski_Zygzaki.djvu would help?

11:04:05 <@Urbanecm> RhinosF1: wargo: i tired, it did not help. however, manually constructing the URL where the thumbnail is supposed to be (https://upload.wikimedia.org/wikipedia/commons/thumb/archive/8/82/20230929224435%21PL_JI_Kraszewski_Zygzaki.djvu/page1-87px-PL_JI_Kraszewski_Zygzaki.djvu.jpg) appears to have worked

I think helped the first solution...

I have the same problem for many my files, for example https://commons.wikimedia.org/wiki/File:%D0%9C%D0%95%D0%92_1883-07.pdf

Removing Wikimedia-maintenance-script-run as there doesn't appear to be an active request to run a maintenance script here after T297942#9668734

Two more:
https://commons.wikimedia.org/wiki/File:Album_%C3%89tienne-Jules_Marey_CDF_13Fi3.pdf
https://commons.wikimedia.org/wiki/File:Jameson_-_Montesquieu_et_l%27esclavage.pdf

In T297942#10948413, @Yann wrote:

Two more:
https://commons.wikimedia.org/wiki/File:Album_%C3%89tienne-Jules_Marey_CDF_13Fi3.pdf
https://commons.wikimedia.org/wiki/File:Jameson_-_Montesquieu_et_l%27esclavage.pdf

Double purge fixed the problem.

In T297942#11685161, @Balajijagadesh wrote:

https://commons.wikimedia.org/wiki/File:%E0%AE%95%E0%AE%B2%E0%AF%88%E0%AE%9E%E0%AE%B0%E0%AF%8D_%E0%AE%95%E0%AE%9F%E0%AE%BF%E0%AE%A4%E0%AE%AE%E0%AF%8D_5.pdf

This pdf file is have 0 x 0 pixel and multiple purge has not resolved the issue.

It works for me, both in Commons and in Tamil Wikisource. Maybe, serving proper metadata was just delayed? Or the problem exists in a specific cache server only?

In T297942#11685553, @Ankry wrote:

In T297942#11685161, @Balajijagadesh wrote:

https://commons.wikimedia.org/wiki/File:%E0%AE%95%E0%AE%B2%E0%AF%88%E0%AE%9E%E0%AE%B0%E0%AF%8D_%E0%AE%95%E0%AE%9F%E0%AE%BF%E0%AE%A4%E0%AE%AE%E0%AF%8D_5.pdf

This pdf file is have 0 x 0 pixel and multiple purge has not resolved the issue.

It works for me, both in Commons and in Tamil Wikisource. Maybe, serving proper metadata was just delayed? Or the problem exists in a specific cache server only?